Originally Posted by merlinextraligh
1/4 mile swim, 5k run.
Haven't done any bricks yet. I have 6 weeks, and am going to do some combined bike/run workouts after I get a little bit of a running base.
Well, with 6 weeks to go, you may actually have the time to do all 3 legs in a workout 2-3 weeks before the race. That way you will have some idea what to expect as far as how your body will feel. If your TT bike (assuming that's what you are on) is set up like a tri bike (steep seat angle, etc.) then your legs may not be as trashed as they would be coming off a road bike.
You might try this, assuming that you can recover for the following week: ride the course at an average speed (1st week of 22 mph), then a run. Next week, up the speed on the bike to 23, then a run. Next week 24, then a run. If you try to hold the run speed constant (whatever speed you pick), you can get a sense of the impact of increasing bike speed on how you feel on the run.